Input ["ATM", "deposit", "withdraw", "deposit", "withdraw", "withdraw"] [[], [[0,0,1,2,1]], [600], [[0,1,0,1,1]], [600], [550]] Output [null, null, [0,0,1,0,1], null, [-1], [0,1,0,0,1]] Explanation ATM atm = new ATM(); atm.deposit([0,0,1,2,1]); // Deposits 1 $100 banknote, 2 $200 banknotes, // and 1 $500 banknote. atm.withdraw(600); // Returns [0,0,1,0,1]. The machine uses 1 $100 banknote // and 1 $500 banknote. The banknotes left over in the // machine are [0,0,0,2,0]. atm.deposit([0,1,0,1,1]); // Deposits 1 $50, $200, and $500 banknote. // The banknotes in the machine are now [0,1,0,3,1]. atm.withdraw(600); // Returns [-1]. The machine will try to use a $500 banknote // and then be unable to complete the remaining $100, // so the withdraw request will be rejected. // Since the request is rejected, the number of banknotes // in the machine is not modified. atm.withdraw(550); // Returns [0,1,0,0,1]. The machine uses 1 $50 banknote // and 1 $500 banknote.